Home |
Search |
Today's Posts |
|
Home Repair (alt.home.repair) For all homeowners and DIYers with many experienced tradesmen. Solve your toughest home fix-it problems. |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to alt.home.repair
|
|||
|
|||
Extending R-value for cathedral ceiling
I have to add fiber glass insulation on my cathedral roof, for a small
cottage 16' x 24', new construction, in Canada. The roof rafters are 2" x 8". For that size, I should use R20 (6") in order to keep 2" for ventilation on the top of insulation. I though I could to be able to use add another 2" x 2" lumber in order to extend the rafters wide to 2 x 10 (instead of 2 x 8) and to use R28 (8") insulation instead of R20 (6"). Is that a big difference for R-value? The cottage is used to spend weekends and some vacation days and not (yet!) for permanent living. What would you recommend to me? And another question: In order to keep the 2" for ventilation I though to use raft-R-mate. Is it wrong to put this raft-R-mate the entire long of rafters or only at the beginning should be enough? Thank you, Chris |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
I need some advice about retro-insulating a cathedral ceiling. | Home Repair | |||
Retro-insulating a cathedral ceiling from within. | Home Ownership | |||
Crown molding on a cathedral ceiling | Home Repair | |||
Building into cathedral ceiling space? | Home Repair | |||
Wet cathedral ceiling | Home Repair |